January in Vaasa averages a daily high of -1.9°C with nights around -8.5°C. Expect roughly 14 wet days totalling 29.6mm. A hard month to visit for comfort alone.
Across the year, the best time to visit Vaasa is July–August.
Based on VAASA VAASAN LENTOASEMA, FI (9.8km), 1995–2024. 17 years of January data.